The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Function discards any whitespace characters until first non-whitespace character is found. Then it takes as many characters as possible to form a valid base-n (where n=base) integer number representation and converts them to an integer value. The valid integer value consists of the following parts:

(opcional) plus or minus sign

(opcional) prefix (0) indicating octal base (applies only when the base is 8)

(opcional) prefix (0x or 0X) indicating hexadecimal base (applies only when the base is 16)

a sequence of digits

The set of valid digits for base-2 integer is 01, for base-3 integer is 012, and so on. For bases larger than 10, valid digits include alphabetic characters, starting from Aa for base-11 integer, to Zz for base-36 integer. The case of the characters is ignored.

Integer value corresponding to the contents of str on success. If the converted value falls out of range of corresponding return type, range error occurs and LONG_MAX, LONG_MIN, LLONG_MAX or LLONG_MIN is returned. If no conversion can be performed, ​0​ is returned.

The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.